Rotations Notes

What is the rule for a 90 degree clockwise rotation?

• $\left(x,y\right)\ \rightarrow\ \left(y,-x\right)$

• $\left(x,y\right)\ \rightarrow\ \left(-x,-y\right)$

• $\left(x,y\right)\ \rightarrow\ \left(-y,\ x\right)$

• $\left(x,y\right)\ \rightarrow\ \left(x,-y\right)$

• $\left(x,y\right)\ \rightarrow\ \left(-x,\ y\right)$

What is the rule for a 180 degree clockwise rotation?

• $\left(x,y\right)\ \rightarrow\ \left(y,-x\right)$

• $\left(x,y\right)\ \rightarrow\ \left(-x,-y\right)$

• $\left(x,y\right)\ \rightarrow\ \left(-y,\ x\right)$

• $\left(x,y\right)\ \rightarrow\ \left(x,-y\right)$

• $\left(x,y\right)\ \rightarrow\ \left(-x,\ y\right)$

What is the rule for a 270 degree clockwise rotation?

• $\left(x,y\right)\ \rightarrow\ \left(y,-x\right)$

• $\left(x,y\right)\ \rightarrow\ \left(-x,-y\right)$

• $\left(x,y\right)\ \rightarrow\ \left(-y,\ x\right)$

• $\left(x,y\right)\ \rightarrow\ \left(x,-y\right)$

• $\left(x,y\right)\ \rightarrow\ \left(-x,\ y\right)$

What is the rule for a 90 degree counterclockwise rotation?

• $\left(x,y\right)\ \rightarrow\ \left(y,-x\right)$

• $\left(x,y\right)\ \rightarrow\ \left(-x,-y\right)$

• $\left(x,y\right)\ \rightarrow\ \left(-y,\ x\right)$

• $\left(x,y\right)\ \rightarrow\ \left(x,-y\right)$

• $\left(x,y\right)\ \rightarrow\ \left(-x,\ y\right)$

What is the rule for a 180 degree counterclockwise rotation?

• $\left(x,y\right)\ \rightarrow\ \left(y,-x\right)$

• $\left(x,y\right)\ \rightarrow\ \left(-x,-y\right)$

• $\left(x,y\right)\ \rightarrow\ \left(-y,\ x\right)$

• $\left(x,y\right)\ \rightarrow\ \left(x,-y\right)$

• $\left(x,y\right)\ \rightarrow\ \left(-x,\ y\right)$

What is the rule for a 270 degree counterclockwise rotation?

• $\left(x,y\right)\ \rightarrow\ \left(y,-x\right)$

• $\left(x,y\right)\ \rightarrow\ \left(-x,-y\right)$

• $\left(x,y\right)\ \rightarrow\ \left(-y,\ x\right)$

• $\left(x,y\right)\ \rightarrow\ \left(x,-y\right)$

• $\left(x,y\right)\ \rightarrow\ \left(-x,\ y\right)$

A 90 degree clockwise rotation is the same as what?

• 90 degree counterclockwise

• 180 degree counterclocwise

• 270 degree counterclockwise

A 180 degree clockwise rotation is the same as what?

• 90 degree counterclockwise

• 180 degree counterclocwise

• 270 degree counterclockwise

A 270 degree clockwise rotation is the same as what?

• 90 degree counterclockwise

• 180 degree counterclocwise

• 270 degree counterclockwise

Rotate the point (-4,5) 90 degrees clockwise.